Model simulations of industrial plumes mesoscale interactions in complex coastal area

摘要

The interaction and possible overlap between the pollution effects generated by different industrial sources influenced by the mesoscale circulation is studied by means of model simulations. A mesoscale, hydrostatic circulation model is used to reproduce the complex structure of both the atmospheric mean flow and turbulence in a region of Central Italy. The pollutant dispersion of two thermal power plants located along the Thyrrenian coast is described by a model integrating the advection-diffusion equation for passive scalars onto an Eulerian grid. A three days simulation has been performed in order to describe a complete diurnalocturnal cycle in a situation representing the typical sea/breeze scenario. An intensive measurement program gave the data set used to define both initial and boudnary conditions and to validate model results. The model capabilities to reproduce the main features of the atmospheric flow are analysed and results are compared with field measurements not used by the model. The simulations have been performed in real meteorological conditions with an hydpothetical emission scenario. Results from the dispersion model are also discussd in order to assess the possible interactions of the diferent sources in the area of interest.